221200120010212 has 96 divisors (see below), whose sum is σ = 452270245109760. Its totient is φ = 92697402195840.

The previous prime is 221200120010113. The next prime is 221200120010227. The reversal of 221200120010212 is 212010021002122.

It is a happy number.

221200120010212 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1049873637 + ... + 1050084307.

It is an arithmetic number, because the mean of its divisors is an integer number (4711148386560).

Almost surely, 2^{221200120010212} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221200120010212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (226135122554880).

221200120010212 is an abundant number, since it is smaller than the sum of its proper divisors (231070125099548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221200120010212 is a wasteful number, since it uses less digits than its factorization.

221200120010212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213121 (or 213119 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 221200120010212 its reverse (212010021002122), we get a palindrome (433210141012334).

The spelling of 221200120010212 in words is "two hundred twenty-one trillion, two hundred billion, one hundred twenty million, ten thousand, two hundred twelve".